Abstract

EMC design of electronic equipment is the key point to determine whether their systems work or not. This paper analyzes the distinction between the differential mode interference and the common mode interference, and emphasize the common mode interference is the main PCB interference. It mainly introduces the characteristics of ΔI noise, how to solve the EMC problems using decoupling capacitors from the application point of view, and discusses how to use PCB design to filter out ΔI noise.

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